CN115845998A - Asymmetric trapezoidal energy-saving lining plate with controllable ball capacity - Google Patents
Asymmetric trapezoidal energy-saving lining plate with controllable ball capacity Download PDFInfo
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- CN115845998A CN115845998A CN202211668181.6A CN202211668181A CN115845998A CN 115845998 A CN115845998 A CN 115845998A CN 202211668181 A CN202211668181 A CN 202211668181A CN 115845998 A CN115845998 A CN 115845998A
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Abstract
The invention discloses an asymmetric terrace-shaped energy-saving lining plate with controllable ball capacity, wherein the mounting surface of the lining plate and the contact surface of a barrel body of a coal mill form a corresponding cambered surface, and the working surface of the lining plate comprises a smooth working curved surface and lug boss surfaces respectively connected with two ends of the smooth working curved surface; the distance from the lowest part of the smooth working curved surface to the mounting surface is 45-50mm, the distance from the convex table surface to the mounting surface is 88-92mm, the boss surface from the lowest part of the smooth working curved surface to the spherical end of the lining plate is in stepped transition, the number of the steps is 1-3, and the boss surface from the lowest part of the smooth working curved surface to the spherical end of the lining plate is in smooth transition; the width of the convex plate surface of the spherical end of the lining plate is 88-92mm, and the width of the convex plate surface of the back spherical end is 38-42mm. The lining plate is made of high-chromium alloy, and the lining plate comprises the following components in percentage by weight: 2.0-3.6% of C, cr:14-18%, mo is 0.5-3%, cu:0.3-1.0%, ni:0.5-1.5%, mn 0.5-1.5%, W0.6-1.2%, si:0.6-1.2%, S is less than or equal to 0.03%, P: less than or equal to 0.03 percent, and the balance being Fe.
Description
Technical Field
The invention relates to the technical field of grinding equipment, in particular to an asymmetric trapezoidal energy-saving lining plate with controllable ball bearing capacity.
Background
The coal mill is a grinding device widely applied to the field of electric power, and the working principle of the coal mill is as follows: the coal mill barrel rotates at a certain rotating speed, the grinding balls at the bottom are attached to the barrel lining plate under the action of centrifugal force and friction force, and when the grinding balls are brought to a certain height, the grinding balls are thrown down due to the gravity of the grinding balls, so that materials at the bottom of the barrel are impacted, crushed and ground.
The operation efficiency of the coal mill is mainly influenced by the lining plate and the steel ball together, wherein the influence of the lining plate on the efficiency of the coal mill comprises two aspects of the waveform of the lining plate and the material of the lining plate. The reasonable design of the liner plate waveform is the key for ensuring the ball carrying capacity of the liner plate. The wave-shaped design has strong ball-carrying capacity, and can effectively improve the quantity of the steel balls doing work and the throwing state of the steel balls, thereby further influencing the loading capacity of the steel balls. When the output force is ensured to be unchanged, the loading capacity of the steel balls can be effectively reduced, so that the load of the coal mill is reduced, and the running current is reduced; or the powder-making output of the coal mill can be effectively improved while the original steel ball loading capacity is kept unchanged. The current is reduced or the output is improved, the unit consumption of coal milling can be effectively reduced, and the energy-saving effect of coal milling of the coal mill is achieved.
Among the prior art, the wave form complete symmetry at common welt both ends, crest to trough transition gently (the lowest of definition working face is the trough, and the highest of working face is the crest), and the crest that forms after the welt combination is comparatively gentle with the slope of trough, because the friction effect wearing and tearing of steel ball and medium are very fast, and the crest width is narrower in addition, causes crest high wear to descend and trough wearing and tearing easily, reduces the effective life of welt. After the waveform wear fails, the wave crest height is insufficient, the ball carrying capacity is insufficient, and the lining plates are easy to collapse to different degrees after long-term operation.
In view of the above, it is desirable to provide a new liner plate structure to solve the above problems.
Disclosure of Invention
The invention aims to solve the technical problem of providing an asymmetric trapezoidal energy-saving lining plate with controllable ball carrying capacity, which can improve the ball carrying capacity of the lining plate and the working efficiency of steel balls, improve the wear resistance of the lining plate and prolong the service life of the lining plate.
In order to solve the problems, the technical scheme of the invention is as follows:
the asymmetric trapezoidal energy-saving lining plate with the controllable ball bearing capacity is characterized in that the mounting surface of the lining plate and the contact surface of a coal mill barrel form a corresponding arc surface, and the working surface of the lining plate comprises a smooth working curved surface and lug boss surfaces respectively connected with two ends of the smooth working curved surface;
the distance from the lowest part of the smooth working curved surface to the mounting surface is 45-50mm, the distance from the boss surface to the mounting surface is 88-92mm, the boss surface from the lowest part of the smooth working curved surface to the spherical end of the lining plate is in step transition, the number of the step transition is 1-3, and the boss surface from the lowest part of the smooth working curved surface to the spherical end of the lining plate is in smooth transition; the width of the convex plate surface of the spherical end of the lining plate is 88-92mm, and the width of the convex plate surface of the back spherical end is 38-42mm;
the lining plate is made of high-chromium alloy, and the lining plate comprises the following components in percentage by weight:
2.0-3.6% of C, cr:14-18%, mo is 0.5-3%, cu:0.3-1.0%, ni:0.5-1.5%, mn 0.5-1.5%, W0.6-1.2%, si:0.6-1.2%, S is less than or equal to 0.03%, P: less than or equal to 0.03 percent, and the balance being Fe.
Further, the distance from the convex table surface to the installation surface is 90mm, and the distance from the lowest position of the smooth working curved surface to the installation surface is 50mm.
Furthermore, the width of the boss surface of the spherical end of the liner plate is 90mm, and the width of the boss surface of the spherical end of the back of the liner plate is 40mm.
Furthermore, the number of the steps of the liner plate strip ball end is three.
Further, the lining plate comprises the following components in percentage by weight:
3.0% of C, cr:16%, mo:0.5%, cu:0.3%, ni:0.8%, mn 1.0%, W0.8%, si:0.8 percent, S is less than or equal to 0.03 percent, P is: less than or equal to 0.03 percent, and the balance being Fe.
Compared with the prior art, the asymmetric trapezoidal energy-saving lining plate with the controllable ball capacity, provided by the invention, has the beneficial effects that:
1. according to the asymmetric trapezoidal energy-saving lining plate with the controllable ball carrying capacity, the ball carrying end of the lining plate is designed to be step-shaped, so that a steel ball is clamped on a step when rotating, the steel ball is carried to a high position, the parabolic fall of the steel ball is increased, the steel ball is thrown higher and farther, the ball carrying capacity of the lining plate is high, the number of the steel balls which do work effectively is increased, the throwing state of the steel ball is improved, the loading capacity of the steel balls can be reduced, the unit consumption of powder making is reduced, and the effect of saving energy in powder making of a coal mill is achieved; the back ball end (the other end opposite to the belt ball end) boss surface is in gentle arc transition to the lowest part of the smooth working curved surface, so that the steel ball rolls relatively from the back ball end convex table surface to the lowest part of the working surface to form uniform abrasion, the height difference value between the lowest part of the working surface and the convex table surface with the ball end is basically stable, and the sufficient belt ball capacity can be met under the long-term operation condition.
2. The asymmetric trapezoidal energy-saving lining plate with the controllable ball bearing capacity, provided by the invention, optimizes parameters of the width of the convex table surface, the height of the convex table surface, the number of the step numbers of the end with the ball bearing and the thickness of the lowest part of the working surface, increases the width of the convex table surface with the ball bearing end, reduces the width of the convex table surface with the ball bearing end, increases the thickness of the working surface, effectively prolongs the service life of a wear surface and integrally improves the service life of the lining plate through the asymmetric design of the end with the ball bearing and the end with the ball bearing.
3. The asymmetric trapezoidal energy-saving lining plate with the controllable ball capacity further improves the wear resistance of the lining plate by optimizing the alloy material of the lining plate.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment 1 of the asymmetric terrace-shaped energy-saving lining plate with controllable ball capacity of the invention;
fig. 2 is a schematic structural diagram of an embodiment 3 of the asymmetric terrace-shaped energy-saving lining plate with controllable ball capacity of the invention.
Detailed Description
In order to make the technical solutions in the embodiments of the present invention better understood and make the above objects, features, and advantages of the present invention more comprehensible, specific embodiments of the present invention are described below with reference to the accompanying drawings.
It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
Fig. 1 is a schematic structural diagram of an asymmetric energy-saving terrace-shaped lining board with controllable ball capacity according to an embodiment 1 of the present invention. The invention provides an asymmetric trapezoidal energy-saving lining plate with controllable ball capacity, wherein a mounting surface 1 of the asymmetric trapezoidal energy-saving lining plate and a contact surface of a coal mill cylinder form a corresponding arc surface, namely after the lining plate is mounted, the mounting surface 1 is tightly attached to the inner wall of the coal mill cylinder, and one side opposite to the mounting surface 1 is a working surface 2. In the invention, the working surface 2 comprises a smooth working curved surface 21 and a lug boss surface 22 connected with two ends of the smooth working curved surface, and a certain fall is formed between the smooth working curved surface 21 and the lug boss surface 22, so that the ball rotates in the work.
To further describe the structure of the liner plate of the present invention, the distance from the lowest part of the smooth working curved surface to the mounting surface is defined as H1 (i.e. the height of the wave trough), and the distance from the boss surface to the mounting surface is defined as H2 (i.e. the height of the wave crest).
The boss surface of the ball end of the liner plate is in stepped transition from the lowest part of the smooth working curved surface, and in the embodiment, the number of steps is one; the boss surface of the other end (back ball end) is in smooth transition to the lowest part of the smooth working curved surface. The ball-carrying end of the lining plate is designed to be step-shaped, so that the steel ball is clamped on the step when rotating, the steel ball is carried to a high position, the steel ball is thrown off higher and farther, the ball-carrying capacity of the lining plate is strong, the quantity of the steel balls which effectively do work and the throwing state of the steel balls are improved, the loading capacity of the steel balls can be reduced, the unit consumption of powder making is reduced, and the effect of saving energy in the powder making of a coal mill is achieved; the boss face of back of the body ball end (with take the opposite other end of ball end) to the minimum of level and smooth work curved surface adopts comparatively gentle pitch arc transition, lets the steel ball form even wearing and tearing from the relative roll of this section distance of back of the body ball end protruding mesa to working face minimum to guarantee that the difference in height of working face minimum and taking the protruding mesa of ball end is stable basically, also can satisfy sufficient ability of taking the ball under long-term operation condition.
In the embodiment, the ball carrying amount and the wear resistance of the lining plate are further improved by optimizing the size of the lining plate. Specifically, the distance H2 from the boss surface to the mounting surface is 88-92mm, the distance H1 from the lowest part of the smooth working curved surface to the mounting surface is 45-50mm, the width W1 of the boss surface at the spherical end of the liner plate is 88-92mm, and the width W2 of the boss surface at the back spherical end is 38-42mm. Compared with the lining plate structure in the prior art, the width of the convex table surface with the spherical end is increased, the width of the convex table surface with the spherical end is reduced, the thickness of the working surface is increased, and the wear resistance and the service life of the lining plate are improved.
In this embodiment, the distance H2 from the boss surface to the mounting surface is 90mm, the distance H1 from the lowest part of the smooth working curved surface to the mounting surface is 50mm, the width W1 of the boss surface at the ball end of the liner plate is 90mm, and the width W2 of the boss surface at the back ball end is 40mm.
In this embodiment, the lining plate is made of a multi-element high-chromium alloy cast iron, and the lining plate comprises the following components in percentage by weight:
3.0% of C, cr:16%, mo:0.5%, cu:0.3%, ni:0.8%, mn 1.0%, W0.8%, si:0.8 percent, S is less than or equal to 0.03 percent, P is: less than or equal to 0.03 percent, and the balance being Fe.
Example 2
The asymmetric terrace-shaped energy-saving lining plate with the controllable ball capacity of the embodiment is basically the same as that of the embodiment 1, and the difference is as follows: in this embodiment, the distance H2 from the boss surface to the mounting surface is 90mm, the distance H1 from the lowest part of the smooth working curved surface to the mounting surface is 45mm, the width W1 of the boss surface at the ball end of the liner plate strip is 80mm, and the width W2 of the boss surface at the other end is 80mm. Other structures are the same as embodiment 1, and are not described herein.
In this embodiment, the lining plate is made of a multi-element high-chromium alloy cast iron, and the lining plate comprises the following components in percentage by weight:
2.0% of C, cr:18%, mo:1%, cu:0.8%, ni:0.5%, mn 0.5%, W0.6%, si:1.0 percent, S is less than or equal to 0.03 percent, P is: less than or equal to 0.03 percent, and the balance being Fe.
Example 3
Please refer to fig. 2, which is a schematic structural diagram of an embodiment 3 of the asymmetric energy-saving terrace-shaped lining board with controllable ball capacity of the present invention. The asymmetric trapezoidal energy-saving lining plate with the controllable ball capacity of the embodiment is basically the same as that of the embodiment 1, and the difference is that: in this embodiment, the lowest part of the smooth working curved surface is in stepped transition to the boss surface of the spherical end of the lining plate, and the number of the steps is three. Compared with embodiment 1, the multi-step structure can improve the ball carrying capacity of the lining plate.
In the embodiment, the lining plate is made of multi-element high-chromium alloy cast iron, and the lining plate comprises the following components in percentage by weight:
3.6% of C, cr:14%, mo:3%, cu:1.0%, ni:1.5%, mn 1.5%, W1.2%, si:1.2 percent, S is less than or equal to 0.03 percent, P is: less than or equal to 0.03 percent, and the balance being Fe.
The mechanical properties of the liners of examples 1-3 were tested and the results were as follows:
| rockwell hardness/HRC | Impact toughness (J/cm) 2 ) | |
| Example 1 | 62 | 15 |
| Example 2 | 60 | 13 |
| Example 3 | 60.5 | 12 |
The data show that the lining plate has high hardness and good wear resistance, and the wear resistance and the service life of the lining plate can be greatly improved by combining the structural design of the lining plate.
Compared with the prior art, the lining plate provided by the invention has the advantage that the ball carrying amount can be increased by 10-15%.
The embodiments of the present invention are described in detail above with reference to the drawings, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art without departing from the spirit and scope of the present invention.
Claims (5)
1. The asymmetric trapezoidal energy-saving lining plate with the controllable ball bearing capacity is characterized in that the mounting surface of the lining plate and the contact surface of a coal mill barrel form a corresponding arc surface, and the working surface of the lining plate comprises a smooth working curved surface and lug boss surfaces respectively connected with two ends of the smooth working curved surface;
the distance from the lowest part of the smooth working curved surface to the mounting surface is 45-50mm, the distance from the convex table surface to the mounting surface is 88-92mm, the boss surface from the lowest part of the smooth working curved surface to the spherical end of the lining plate is in stepped transition, the number of the steps is 1-3, and the boss surface from the lowest part of the smooth working curved surface to the spherical end of the lining plate is in smooth transition; the width of the boss surface of the spherical end of the lining plate is 88-92mm, and the width of the boss surface of the back spherical end is 38-42mm;
the lining plate is made of high-chromium alloy, and the lining plate comprises the following components in percentage by weight:
C:2.0-3.6％,Cr：14-18％，Mo:0.5-3％，Cu：0.3-1.0％，Ni：
0.5-1.5%, mn 0.5-1.5%, W0.6-1.2%, si:0.6-1.2%, S is less than or equal to 0.03%, P: less than or equal to 0.03 percent, and the balance being Fe.
2. The asymmetric trapezoidal energy-saving lining board with the controllable ball capacity as claimed in claim 1, wherein the distance from the convex table surface to the installation surface is 90mm, and the distance from the lowest part of the smooth working curved surface to the installation surface is 50mm.
3. The asymmetric energy-saving trapezoidal energy-saving lining plate with the controllable ball capacity as claimed in claim 2, wherein the width of the boss surface of the ball end of the lining plate is 90mm, and the width of the boss surface of the ball end of the back of the lining plate is 40mm.
4. The asymmetric trapezoidal energy-saving liner plate with the controllable ball capacity according to claim 1, wherein the number of the steps of the ball end of the liner plate is three.
5. The asymmetric energy-saving trapezoidal platform lining plate with the controllable ball capacity according to claim 1, wherein the lining plate comprises the following components in percentage by weight:
3.0% of C, cr:16%, mo:0.5%, cu:0.3%, ni:0.8%, mn 1.0%, W0.8%, si:0.8 percent, S is less than or equal to 0.03 percent, P is: less than or equal to 0.03 percent, and the balance being Fe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211668181.6A CN115845998A (en) | 2022-12-24 | 2022-12-24 | Asymmetric trapezoidal energy-saving lining plate with controllable ball capacity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211668181.6A CN115845998A (en) | 2022-12-24 | 2022-12-24 | Asymmetric trapezoidal energy-saving lining plate with controllable ball capacity |
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| Publication Number | Publication Date |
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| CN115845998A true CN115845998A (en) | 2023-03-28 |
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|---|---|---|---|
| CN202211668181.6A Pending CN115845998A (en) | 2022-12-24 | 2022-12-24 | Asymmetric trapezoidal energy-saving lining plate with controllable ball capacity |
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- 2022-12-24 CN CN202211668181.6A patent/CN115845998A/en active Pending
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